Well, since SearXNG aggregates results from more than 70 search engines and not solely Google, it’s a safe bet they’ll be fine regardless of Googles moves. However, sourcing results from Google may be impacted, but they still have many other options built in aside from Google. Whoogle being a proxy only for Google makes it reliant on Google, so their upstream changes will be very noticeable. This being the case, I’d say switching to SearXNG is going to be the best move as it has redundancy built in making it not dependent on any one engine.
For anyone new to the Linux world, I can’t recommend Learn Linux TV enough. He has a video walking through this exact process, here’s an Invidious and YouTube link for it.
As far as dual booting goes, issues can arise after updates. I recall this happening a few months back due to a Windows update. So just be aware of this possibly happening down the road. I need Windows for work at times too, but I strictly use a VM. I’ve hated Microsoft since Windows 8, their amount of user tracking is bonkers and a big part of why I just use a VM. This is just food for thought though.